<template>
  <h2 ref="title2">你好</h2>
  <button @click="showLog">测试</button>
  <Person ref="ren"/>
</template>

<script lang="ts" setup name="App">
  // JS 或 TS
  import Person from './components/Person.vue'
  import { ref } from 'vue'

  let title2 = ref();
  let ren = ref();

  function showLog() {
    console.log(ren.value)
    ren.value.showLog()
  }
</script>
